Concrete pipe joint



June 22, 1937. J, UKROPINA 2,084,456

CONCRETE PIPE JOINT Filed March 16, 1936 Fig.1

r a/a/ 71-1, 1 l L g 7 6 INVENTOR.

Patented June 22, 1937 UNITED STATE-S PATENT OFFICE 2,084,466 ooNcit'E'rE FIFE; JOINT Bozidar J. Ukropina, Los Angcles, Calif.

Application March 16, 1936, Serial No. 69,088 2 Claims. (01. 285-112) This invention relates to improvement in concrete'pipes.

that the inner surface of the pipe will not be wet :-;dur-ing the caulking operation.

Another object of my invention is to provide a concrete pipe joint wherein one of themembers at the joint is provided with a pair of 'reversely facing corrugations to stiffen the member and to provide a caulking space.

An additional object of my invention is to provide a concrete pipe including a corrugation on the bell end which'corrugation opens inwardly and wherein there is a bevelled or outwardly." flared-portion on the pipe beyond the corrugation so. that an outwardly formedcorrugation is provided.

Other objects and the advantages of the inven-'- tion will be apparent from the following descrip-' tio'n-take'n in connection with the accompanying drawing. wherein:

1 is a side elevation showing a concrete" pipe embodyingthe features of my invention;

Fig. 2 is an enlarged, fragmentary, section;

showing a completed joint between two lengths of Fig. 3 is a View similar to Fig. 2 showing a modi fled form of my invention; and

Fig. 4 is a view similar to Fig. 2 showing a furtherl-modification ofmy invention.

Referring to-the drawing by-reference characters I have shown a concrete pipe embodying the features of my invention'at l0. This pipe com-' prises a plurality of lengths which are; similar and-are each provided witha spigot end' I2 and a bell end I3.

As shown each-lengthof pipe includes outer and-inner layers of concrete l4 and "I5 witha tubular,--metal-, reenforcing, member l6 embedded 5o between the inner and outerlayers. Atthe spigot end of each length a tubular,

metaL- spigot, -member'|1 is secured to the reenforcing -member I6 as by welding at I8 although the-spigot member may be secured in any desir- 55 able manner.

The spigotmember is preferably cylindrical throughout its entire length and" provided at the outer endwith a bevelled portion The bell end is provided with a metal, bell member which includes a cylindrical portion 2| secured to the reenforcingmember lfiby welding as at 2! and an integral outwardly flared portion 22, a cylindrical portion 23 and an inwardly flared portion 24' which terminates in an outwardly bevelled portion 25"to'which a cylindrical end portion 26 is secured.

The outer layer of concrete l4 terminates at the bell 'end as at 21 at a location flush with the end of the cylindrical'end portion 26. The inner layer of concrete I5 at the spigot end terminates flush With the end of the spigot member as indicatedat 28. The outer layer of concrete at the spigot end terminates at a location spaced from the inner end of the spigot member as indicated at 29,

while the inner layer of concrete of the bell'end is set backa'ndbevelled as at 30 in line with the outwardly" flared portion 22.

The outer diameter of the spigot member is slightly less than the innerdiameter'of the bell member at the juncture of the'outwardly flared portion'and the bevelled portion so that the two may be easily assembled with the frusto-conical end face of the outwardly flared portion engaging andsliding 'along'the end of the Spigot member. The outer and the inner diameters o f'the spigot member are substantially the'same asthe outer and inner-diameters, respectively, of the cylindrical' portion 22" 'of the bell member.

Prior'to the completion of a joint I preferably place a ring 33 of'more or less plastic or compressible material on the inner end of the spigot member. As shown this'ringcomprises a plurality of strands More material such as rope'about which compressible; deformable material such as asphalt is arranged and when the jointis initially laid by t moving 'one length upon the other this member 33 serves to provide a temporary caulking so that no'water' willenter, when thepipe is laid in a trench, to interfere with the caulking.

After'the parts are'assembled as shownin Fig.

2 leador other caulking material 35 is inserted in the tapering space between the spigot member and the bell member and after this is t'amped-in place 'a'fllling of cement 36 is inserted and then concrete mortar 31 may be placed'to complete the joint.

In Fig. 3 I show'a modification wherein a plurality of lengthsM are provided with a spigot end 42 and a bell end 43 embedded between an "outer and inner layer of concrete 44 and 45 with a tubu l end'of the bevelled portion 55.

-01? -concrete 45 at the spigot end terminates flushprovided at the outer end with a bevelled portion49. x I The bell endis provided with a metal, bell member which includes a cylindrical portion 5| secured to the reenforcing member '46 by weld- .ing as at 56' and an integral outwardly .flared 5 portion 52, a cylindrical portion 53 and an in-.'

wardly flared portion 54 which terminates'in an outwardly bevelled portion 55.

v the bell end as at 51 at a location flush with the with the end of the spigot member as indicated at 58. V The outer layer of concrete at the spigot end terminates at a location'spaced from the inner end of the spigot; member :as indicated at 59, while the inner layer of concrete of the bell end is set back and bevelled as at in line with the outwardly flared portion 53. r

The outer diameterpof the spigot member is 3Q slightly less than the inner diameter of. the bell member at the juncture of the outwardly flared portion andwthe bevelled portion so that the two,

maybe easily assembledwith the frusto-c onical end face of the outwardly flared portion engaging V V 35 and sliding along the end offthe spigotmember.

The outer and the inner diameters of the spigot memberiare;substantially the, same? as the outer and inner diameters, respectively, of the. cylindrical portion52 of the bell member..

7 Priortothecompletionof a'jointiI preferably place a ring 53 of more 'orlessplasticor compressible material on the inner end of the spigot member. As shown this ring comprises a rope 64 about which compressible, deformable'matejoint is initially laid bymoving one length upon the other this member'63 serves to :provide. a

temporary caulkingso that no water will entenl I when the pipe. is laid in a trench, to, interfere. with the caulking.

' After the parts are assembled as shown in Fig.

7 3 lead or other caulkingv material 66 is. inserted bell member and after this'istamped in place a filling of cementGB' and mortar 61' is inserted to complete the joint. I In Fig. 4 1 have shown a modified concrete pipe which comprises a plurality of. lengthsll which are similar and are each provided with a spigot V end 12 and a bell ,end 13.

As shown each length includes outer and inner layers of concrete." and 15' with a tubular, .1 metal, reenforcing member 16 embedded between 5 the layers;

' enforcing member 16 as by welding at 18 although the spigot member may .be' secured in any. desirable manner. -The spigot member is 73 preferably cylindrical at its inner end to'which a The inner layer T with the. caulking.

. joint. a 5 rial such as asphalt is arranged and when'the 1 1n the space between the spigot memberand the V vtionsjis such that great rigidity and stre'ngt hiis provided in the joint;

, which can i be economically manufactured I and,

- I 1 v i the reinforcement with *thei bell' jrnember Atthe spigot .end of each lengthf a tubular,

'f metal, spigot, member 11 is secured to the re-'.

portion 81,251, cylindrical portion 83, and an inwardly flared portion. 84 whichterminates in an drical end portion 86 is'secured.

The outer layer of concrete 14 terminates at '5 the bell end as at 81 at a location flush with the ,outwardly bevelled portion to which a cylinend of the'cylindrical end portion 86. The inner 'at 89, while the inner layer of concreteof the A 7 bell end is set back and bevelled as at 90 in line with the'outwardly flared, portion 82. r 15.; d The outer diameter of. the spigot Vmember is V 'slightly'less than therinner diameter of the bell The outer layer of concrete 44 terminates atv the outer and :inner diamete'rs, respectively,"jof 25i the cylindrical portion of the bell members" Prior to? the completion of a joint I preferablyplace a ring 92 of more or less plastic roompressible material on theinnersend of th' member. As shown this ring comprises V rality of strands .93 OfaimateriiaI such 138 about which compressible; deiormable rna eri such as.asphalt; is arranged and whenv-the jom i is initially laidby moving one-length; the} r other this member '92 servesto 'providea'tenie 3 porary caulking so that no water; i will? enter, whenlthe pipe is laid in a treneh, to; t w

After the parts areassembled'asshown, 4 lead or other caulking mat'erial 961's inserted in the spacebetweenthespigotmember and the g 7 bell member. and after this istampedinplace a filling of cement 91: is,- inserted tocompletel'ther 'From the; drawingand descripti'onit vwill apparent that the bell members,- according to the present invention, are provided with, ain-in'y wardlyopening corrugation which forms a" stillening'porti-on and which receives caulkingmate i rial, and that also an outwardly opening -corruga 507 tion is provided beyond the caulking corrugathan and that. the relation ofqthese two 'corrugag From the foregoing description lt w ill teas-9'; parent that I have provided a novel .pipefjoint installed. r

Having thusdescribed my inventionlclaimz" 1. In a concrete pipe, a plurality Q le S; 0 each of said lengths including a.- reinforcement with a bell member at one end ofth'ei-reinforcement' anda spigot member at the other end spigotmember spaced apart 'sufiiciently r ceive packing material; the improvement hich consists in providing the bell portionof' thereinforcementwith an inwardlyextendingfib ct ing to separate the-packing into two sections. j

2. In a concrete pipe, a plurality ofler gtl'is vo each of said lengthsincluding a reinforcementa bell member at one end of the-reinforcementand f a spigot member'at the other end -of-the rei'nf torcement, said spigotmember c'o'i nprisingfacylindrical endportion, said bell member commie- 5 ing an inner cylindrical end. portion and an outer cylindrical portion larger than the inner portion, said bell and spigot members being spaced apart to form a chamber, packing material in the chamber and engaging the exterior of the spigot member and the interior of the bell memher and also engaging the adjacent end of the length of the pipe material between the bell member and the spigot member, said bell member having an inwardly extending rib acting to separate the packing material and the caulking material.

BOZIDAR J. UKROPINA. 

